$ 195.27
Phoenix Contact PSR-MC20-3NO-1DO-24DC-SP safety relay, compact 24V DC design with SIL 3, PL e compliance for emergency stop and safety door protection.
The Phoenix Contact PSR-MC20-3NO-1DO-24DC-SP safety relay is a compact and powerful solution for safeguarding emergency stop buttons and safety doors in modern industrial systems. With a slim 12.5 mm housing, it saves valuable control cabinet space while maintaining high reliability. The relay achieves up to SIL 3, Cat. 4, PL e, making it suitable for demanding safety applications. Featuring three enabling current paths and one digital signal output, it ensures dependable operation in one-channel control setups. Designed for flexible integration and rapid installation, it delivers robust protection for machines and operators where space and safety standards are critical.
The PSR-MC20-3NO-1DO-24DC-SP combines advanced safety performance with ease of use. Its dual start modes—automatic or manual—allow engineers to adapt safety strategies to specific environments. A fast response time under 175 ms enhances operator security, while its compact design reduces panel costs by fitting more relays on a DIN rail. Built for tough conditions, it withstands vibration, temperature swings, and continuous industrial duty. By aligning with international standards such as EN ISO 13849-1 and EN IEC 62061, this relay helps manufacturers achieve compliance without complexity. Ideal for machine builders and plant operators, it delivers both cost efficiency and reliable protection.
The PSR-MC20-3NO-1DO-24DC-SP stands out for its ultra-slim 12.5 mm housing, making it perfect for control cabinets where every millimeter matters. It combines high safety integrity (up to SIL 3, Cat. 4, PL e) with flexible start modes and reliable monitoring, giving engineers a compact but powerful solution that saves space, reduces wiring effort, and ensures peace of mind in critical applications.
This safety relay tackles the challenge of protecting operators and machines in fast-moving industrial environments. Traditional relays often consume more space and complicate compliance; the PSR-MC20 solves both by offering compact dimensions, rapid response times, and full alignment with international safety standards. It ensures emergency stops and safety doors are monitored with precision, preventing costly downtime and enhancing workplace safety.
| Feature | Details | Benefit |
|---|---|---|
| Customs Tariff Number | 85371098 | Facilitates smooth international trade |
| Supply Voltage | 24 V DC (20.4–26.4 V DC) | Standard industrial supply for universal use |
| Housing Width | 12.5 mm | Saves control cabinet space, higher packing density |
| Safety Ratings | Up to SIL 3, Cat. 4, PL e | Meets strict international safety requirements |
| Control Type | 1-channel, automatic/manual start | Flexible integration into safety systems |
| Enabling Current Paths | 3 NO contacts | Reliable multiple safety circuits |
| Signal Output | 1 digital PNP output | Easy system diagnostics and status monitoring |
| Response Time | <175 ms | Quick reaction to protect operators and machines |
| Mechanical Service Life | 10 million cycles | Long operational reliability, reduced replacement cost |
| Mounting | DIN rail, pluggable Push-in terminals | Fast installation and maintenance-friendly |
| Ambient Temperature | -40 °C to +55 °C | Suitable for demanding industrial environments |
| Protection | IP20 device, install location ≥ IP54 | Enhanced reliability in harsh conditions |
| Weight | 139.9 g (excl. packing) | Lightweight and easy to handle |
Download Phoenix Contact PSR-MC20-3NO-1DO-24DC-SP 2700467 Datasheet
| Commercial Data | Details |
|---|---|
| GTIN Number | 4046356912754 |
| Tariff Number | 85371098 |
| Weight (Excl. Packing) | 139.9 g |
| Weight (Incl. Packing) | 175.2 g |
| Country of Origin | Germany (DE) |
1. Emergency Stop on Packaging Lines
Modern packaging lines run at high speed, so even a small delay in stopping the system during a fault can cause major losses. The PSR-MC20-3NO-1DO-24DC-SP safety relay is commonly used to connect emergency stop buttons and guard switches directly to machine power circuits. Its three enabling current paths create redundancy, ensuring the machine halts safely every time. The slim 12.5 mm design means several units can be installed side-by-side without consuming valuable control panel space. With a reaction time of less than 175 milliseconds, this relay offers the quick intervention needed to protect workers and prevent product damage.
CNC machining centers pose hazards when operators access the cutting area while spindles or tools are running. The PSR-MC20-3NO-1DO-24DC-SP is installed to monitor protective doors, stopping machine movement instantly if a door opens. Engineers can select between automatic or manual reset depending on workflow requirements, offering flexibility in production environments. Its high safety level, reaching SIL 3 and PL e, ensures compliance with stringent industry standards. Built to resist vibration and temperature variations, the relay is well suited for machining halls where reliability is essential. By combining compact design with dependable performance, it helps manufacturers maintain productivity while safeguarding personnel.
In robotic welding or assembly cells, operators often work near moving arms or high-energy equipment. The PSR-MC20-3NO-1DO-24DC-SP provides reliable safety by monitoring interlocks and emergency stop buttons around the work area. Its multiple current paths guarantee safe interruption of power, while the digital output enables supervisors to check system status and log safety events. The device’s fast reaction and force-guided contacts make it dependable for repetitive stop-start operations typical in automated cells. Easy installation on DIN rails allows quick integration into existing panels, and its compact size reduces space usage. With this relay, robotic cells achieve higher protection without compromising productivity.
Conveyors in mining, recycling, or bulk material handling must stop immediately when hazards arise. The PSR-MC20-3NO-1DO-24DC-SP is often deployed to connect emergency pull-cords, stop buttons, and safety gates along the conveyor line. Its rugged design tolerates harsh environments with vibration and dust, while the wide operating temperature range supports outdoor use. The relay’s three enabling paths ensure reliable stopping even if one circuit fails. The additional digital output helps maintenance teams diagnose faults remotely and restart the system faster. By providing both dependable safety performance and diagnostic feedback, this relay helps keep large conveyor systems safe, efficient, and compliant.
| Category | Model / Part Name | Part Number | How It Complements the Product |
|---|---|---|---|
| Actuator | PSR-ESS-M0-H110 | 1221757 | Actuator with anti-lock collar for modular emergency stop switches; provides reliable activation in conjunction with the relay. |
| Module Holder | PSR-ESS-ACC-CB1-C3 | 1221747 | Module holder for modular emergency stop switches; securely connects actuator and contact block for stable operation. |
| Contact Module | PSR-ESS-ACC-CB1-NC-SC | 1221752 | Force-guided N/C contact module for safety-related shutdowns, designed to integrate with the relay in high safety applications. |
| Crimping Tool | CRIMPFOX 6 | 1212034 | Professional crimping pliers for ferrules, ensuring secure conductor connections to the relay’s Push-in terminals. |
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Warranty – 1-year warranty for your peace of mind.
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